Rock oil, mineral oil, or natural oil, a dark brown or greenish inflammable liquid, which, at certain points, exists in the upper strata of the earth, from whence it is pumped, or forced by pressure of the gas attending it. It consists of a complex mixture of various hydrocarbons, largely of the methane series, but may vary much in appearance, composition, and properties. It is refined by distillation, and the products include kerosene, benzine, gasoline, paraffin, etc.
A century ago, petroleum - what we call oil - was just an obscure commodity; today it is almost as vital to human existence as water. James Buchan
Vladimir Putin is leading a dying country. Vladimir Putin's regime exports three things: petroleum products - coal, natural gas, and hydrocarbon energy in the form of petroleum. Number two, it exports arms, and, number three, it exports people. Oliver North
To cause the face to appear in a mass of flame make use of the following: mix together thoroughly petroleum, lard, mutton tallow and quick lime. Distill this over a charcoal fire, and the liquid which results can be burned on the face without harm. Harry Houdini
Petroleum is a more likely cause of international conflict than wheat. Simone Weil
Important reserves of natural resources, like petroleum and precious metals, are the bulwarks for laying the foundations for the future. Enrique Pena Nieto